Hwang In-ho first wrote the screenplay of Sisily 2km (also known as To Catch a Virgin Ghost), a 2004 film that combined horror and black comedy elements in a story about gangsters (played by Im Chang-jung and Kwon Oh-joong) who steal a diamond and escape to a small town, .
His next screenplay, Love Phobia (titled "Lizard" in Korean) was a 2006 melodrama that starred Cho Seung-woo and Kang Hye-jung as a couple who meet each other only thrice in the 20 years spanning their childhood to adulthood.
[1] His third screenplay, Two Faces of My Girlfriend (2007) was a romantic comedy about a 30-year-old male virgin and loser who falls for a woman with DID (played by Bong Tae-gyu and Jung Ryeo-won).
In 2011, Hwang made his feature directorial debut with Spellbound (titled "Chilling Romance" in Korean), about a stage magician (Lee Min-ki) who meets an introverted woman (Son Ye-jin) who is constantly haunted by ghosts.
Kim played a developmentally disabled woman who wreaks revenge on the serial killer (Lee) who murdered her beloved younger sister.